Improved quantum randomness amplification with finite number of untrusted devices based on a novel extractor

doi:10.1088/1674-1056/27/1/010305

Abstract Quantum randomness amplification protocols have increasingly attracted attention for their fantastic ability to amplify weak randomness to almost ideal randomness by utilizing quantum systems. Recently, a realistic noise-tolerant randomness amplification protocol using a finite number of untrusted devices was proposed. The protocol has the composable security against non-signalling eavesdroppers and could produce a single bit of randomness from weak randomness sources, which is certified by the violation of certain Bell inequalities. However, the protocol has a non-ignorable limitation on the min-entropy of independent sources. In this paper, we further develop the randomness amplification method and present a novel quantum randomness amplification protocol based on an explicit non-malleable two independent-source randomness extractor, which could remarkably reduce the above-mentioned specific limitation. Moreover, the composable security of our improved protocol is also proposed. Our results could significantly expand the application range for practical quantum randomness amplification, and provide a new insight on the practical design method for randomness extraction.

Keywords: quantum random number generation quantum randomness amplification quantum key distribution

Received: 21 August 2017
Revised: 07 October 2017
Accepted manuscript online:

PACS:	03.67.-a	(Quantum information)
	03.67.Hk	(Quantum communication)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61775185).

Corresponding Authors: Ming-Feng Xu
E-mail: xmfswjtu@126.com

Cite this article:

Ming-Feng Xu(徐明峰), Wei Pan(潘炜), Lian-Shan Yan(闫连山), Bin Luo(罗斌), Xi-Hua Zou(邹喜华), Peng-Hua Mu(穆鹏华), Li-Yue Zhang(张力月) Improved quantum randomness amplification with finite number of untrusted devices based on a novel extractor 2018 Chin. Phys. B 27 010305

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Improved quantum randomness amplification with finite number of untrusted devices based on a novel extractor

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